traditional folklore has been that UNIX was done in response to issues with MULTICS (ge645)

some of the people from CTSS went to 5th flr, 545 tech sq to Multics ... and others went to the science center on the 4th flr.

The science center did virtual machine system ... originally cp40 on 360/40 with custom hardware modifications to support virtual memory. cp40 morphed into cp67 when the science center got a 360/67 that came standard with virtual memory support. combined cp67 & cms group was less than dozen people. I got involved in jan68, when three people came out and installed cp67 at univ. where I was undergraduate.